Lens cleaning means



Patented Sept. 8, 1936 UNITED STATES PATENT OFFICE No Drawing. Application October 11, 1935, Serial No. 44,571

1 Claim.

The invention relates to a leather for cleaning eyeglasses and lenses of all descriptions.

One form of the invention is embodied in chamois which has been treated with an aqueous 5 solution of chromium oxide and glycerine but the invention is limited to this particular form only to the extent indicated in the appended claim. In practicing the invention, three drains of glycerine are preferably employed for each three ounces by volume of chromium oxide. The above mentioned quantities of chromium oxide and glycerine are introduced preferably into a pint of boiling water.

The aqueous solution is then permitted to cool 5 to a luke warm condition, preferably a little higher than room temperature. The chamois is then dipped into the aqueous solution a plurality of times. In practice, it has been found that if the chamois is dipped into the aqueous solution 20 twice, a satisfactory means for cleaning lenses will be obtained. After the chamois is dipped into the aqueous solution the first time, the surplus liquid is removed therefrom before it is dipped into the aqueous solution the second time. After 25 the chamois has been dipped into the aqueous solution again, the surplus liquid is again removed but not as thoroughly as in the first instance. The chamois is then dried after which it is sponged with a dry sponge to remove excess chromium oxide. The chamois is also worked and stretched until it becomes pliable. The sponging may be done before or after or during the working and stretching process.

It is understood, of course, that larger quan- 5 tities of chromium oxide maybe employed than the proportions given above, but in such instances the excess oxide is sponged from the chamois. It will also be understood that the glycerine is a hygroscopic agent. While it is possible to vary 10 from the proportions given above, it has been found that it is preferable to keep the proportion of glycerine relatively low as otherwise the chamois will have a tendency to smear the lenses.

While I have described certain embodiments of my invention, it is to be understood that it is capable of many modifications. Changes, therefore in the construction and arrangement may be made without departing from the spirit and scope of the invention as disclosed in the appended claim, in which it is my intention to claim all novelty inherent in my invention as broadly as possible, in view of the prior art.

I claim:

A chamois skin as cleaning leather, said chamois skin having chromium oxide and a hygroscopic agent therein.

LOUIS A. GREDYS. 

